libio/tst-atime.c

   1 #include <fcntl.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <unistd.h>
   6 #include <sys/stat.h>
   7 #include <sys/statvfs.h>
   8
   9
  10 static int do_test (void);
  11 #define TEST_FUNCTION do_test ()
  12 #define TIMEOUT 5
  13 #include <test-skeleton.c>
  14
  15
  16 static int
  17 do_test (void)
  18 {
  19   char *buf;
  20   int fd;
  21   FILE *fp;
  22   int ch;
  23   struct stat st1;
  24   struct stat st2;
  25   struct statvfs sv;
  26   int e;
  27
  28   buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
  29   if (buf == NULL)
  30     {
  31       printf ("cannot allocate memory: %m\n");
  32       return 1;
  33     }
  34   stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
  35
  36   fd = mkstemp (buf);
  37   if (fd == -1)
  38     {
  39       printf ("cannot open temporary file: %m\n");
  40       return 1;
  41     }
  42
  43   /* Make sure the filesystem doesn't have the noatime option set.  If
  44      statvfs is not available just continue.  */
  45   e = fstatvfs (fd, &sv);
  46   if (e != ENOSYS)
  47     {
  48       if (e != 0)
  49         {
  50           printf ("cannot statvfs '%s': %m\n", buf);
  51           return 1;
  52         }
  53
  54       if ((sv.f_flag & ST_NOATIME) != 0)
  55         {
  56           puts ("Bah!  The filesystem is mounted with noatime");
  57           return 0;
  58         }
  59     }
  60
  61   /* Make sure it gets removed.  */
  62   add_temp_file (buf);
  63
  64   if (write (fd, "some string\n", 12) != 12)
  65     {
  66       printf ("cannot write temporary file: %m\n");
  67       return 1;
  68     }
  69
  70   if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
  71     {
  72       printf ("cannot reposition temporary file: %m\n");
  73       return 1;
  74     }
  75
  76   fp = fdopen (fd, "r");
  77   if (fp == NULL)
  78     {
  79       printf ("cannot create stream: %m\n");
  80       return 1;
  81     }
  82
  83   if (fstat (fd, &st1) == -1)
  84     {
  85       printf ("first stat failed: %m\n");
  86       return 1;
  87     }
  88
  89   sleep (2);
  90
  91   ch = fgetc (fp);
  92   if (ch != 's')
  93     {
  94       printf ("did not read correct character: got '%c', expected 's'\n", ch);
  95       return 1;
  96     }
  97
  98   if (fstat (fd, &st2) == -1)
  99     {
 100       printf ("second stat failed: %m\n");
 101       return 1;
 102     }
 103
 104   if (st1.st_atime > st2.st_atime)
 105     {
 106       puts ("second atime smaller");
 107       return 1;
 108     }
 109   else if (st1.st_atime == st2.st_atime)
 110     {
 111       puts ("atime has not changed");
 112       return 1;
 113     }
 114
 115   fclose (fp);
 116
 117   return 0;
 118 }